L322 4.4 V8 high voltage boiling battery 17v+

Dean07L322 · Jul 27, 2021

Hi, i have this Exact problem on my 2007 L322, 12.8V with engine off, 15V at idle, and 18V going down the road which shuts all the systems down.
I've changed the alenator 2 times now and it still does the exact same thing.

tomcat59alan · Jul 27, 2021

There's more American volts to our British volts,

I'm not into electrickery but I would hazard a guess at the voltage regulator.

Dean07L322 · Jul 27, 2021

tomcat59alan said:
There's more American volts to our British volts, I'm not into electrickery but I would hazard a guess at the voltage regulator.

is the voltage regulator internal on the alternators?

tomcat59alan · Jul 27, 2021

Dean07L322 said:
is the voltage regulator internal on the alternators?

It is on mine but it's a P38 , hopefully someone with experience will answer.Welcome to the mad house.

Dean07L322 · Jul 27, 2021

does anyone have a diagram of the wires going into the alternator and which pins the wires go too? the plug disintegrated when it came off, and im not sure my mechanic put them back correctly.

Dean07L322 · Jul 27, 2021

tomcat59alan said:
It is on mine but it's a P38 , hopefully someone with experience will answer.Welcome to the mad house.

Thanks, lol

tomcat59alan · Jul 27, 2021

Dean07L322 said:
does anyone have a diagram of the wires going into the alternator and which pins the wires go too? the plug disintegrated when it came off, and im not sure my mechanic put them back correctly.

Which could possibly account for your problem.

The Mad Hat Man · Jul 27, 2021

Check earths too. Maybe an extra one to engine?

Nodge68 · Jul 28, 2021

Dean07L322 said:
I've changed the alenator 2 times now and it still does the exact same thing.

Have you replaced the battery?
It could be the battery is going open circuit, allowing the voltage to climb excessively.

L322 4.4 V8 high voltage boiling battery 17v+

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